Hall IC
LT202A
LT202A
s
Features
¡Increasing
the efficiency of motor rotation due to cutting
the electric current which doesn't contributing to rotation
¡Combining
a GaAs Hall device and a driver IC in a
compact 8-pin SOP package
¡Operation
in low magnetic flux density (10mT) due to
applied high sensitive Hall device
¡Built-in
protection circuit, alarm output and automatic
restart circuit
s
Applications
¡Brushless
fan motors
1. Cooling fan motors for personal computers, word
processors, etc.
2. Directly cooling fan motors for cooling fin, PCB, etc.
3. Fan motors for air circulation of temperature sensor in
air conditioner
Y
8-0.4±0.1
8
GaAs Hall IC for Fan Motor
s
Outline Dimensions
P 1.27TYP
5
(Unit : mm)
4.4±0.2
6.5±0.4
-X
0
1
5.0±0.2
4
0.15±0.05
-
X direction : against package
Sensor
positioning
center -1.4±0.2a
Y direction : against package
center 0.0±0.2a
Z direction : from package
surface 0.0±0.2a
Terminal connection
1:Input terminal for phase detection
2:Input terminal for phase detection
3:Condenser terminal for rotation detection
4:GND
5:Alarm output
6:Vout
7:Vout
8:Vcc
The section of leads (both sides of package in X-direction) is connected with the terminal of
internal IC. Be careful in connecting other circuits.
s
Absolute Maximum Ratings
Parameter
Supply voltage
Output voltage
Output current (peak)
Output current (continuous)
Coil input voltage
Alarm output sink current
Power dissipation
Oparating temperature
Storage temperature
Soldering temperature
*1
Symbol
V
CC
V
O
I
OMAX
I
O
V
IN
I
SINK
P
D
T
opr
T
stg
T
sol
Conditions
Rating
30
55
750
450
250
150
-0.2 to 0.2
5
400
-20 to +80
-55 to +150
260
(T
a
=25˚C)
Unit
V
V
mA
mA
mA
mA
V
mA
mW
˚C
˚C
˚C
V
CC
=12V
V
CC
=24V
V
CC
=12V
V
CC
=24V
*1 Soldering time : within 10 seconds
s
Electrical Characteristics
Parameter
Output saturation voltage
Output cut-off current
Operating supply voltage
Supply current
Operating magnetic flux density
Coil input sensitivity
Alarm output saturation voltage
Alarm output leakage current
Symbol
V
OUT
I
OC
V
CC
I
CC
B
1
B
2
V
IN
V
SAT
I
LEAK
Conditions
I
O
=250mA, V
CC
=12V
V
O
=55V
*
At no-load
MIN.
-
-
8
-
-10
-
15
-
-
TYP.
-
-
-
-
-
-
-
-
-
MAX.
1.5
30
28
13
-
10
-
0.5
15
0.1±0.1
0.60
As for dimensions of tape-packaged
products, refer to page 44 .
0.65
1.25±0.2
(5.05)
(T
a
=25˚C)
Unit
V
µA
V
mA
mT
mT
mV
V
µA
I
SINK
=4mA
V=28V
(Note) Unspecified condition is Vcc=24V.
* In case of oscillating from power supply due to wiring, connect a condenser between 8-pin (Vcc) and 4-pin (GND).
In the absence of confirmation by device specification sheets, SHARP takes no responsibility for any defects that may occur in equipment using any SHARP devices
shown in catalogs, data books, etc. Contact SHARP in order to obtain the latest device spcification sheets before using any SHARP device.
Hall IC
s
Block Diagram and Timing Chart
V
CC
Constant voltage
+
-
LT202A
8
7
Motor
6
Phase
detection coil 1
2
+
-
+
-
Rotation detector/
automatic restart circuit
3
4
5
GND Alarm output
Timing chart
Magnetic pole
S (>10mT)
S (>10mT)
N(<-10mT)
N(<-10mT)
Coil input(1:+)
V
1
-V
2
=<0
V
1
-V
2
>15mV
V
1
-V
2
<-15mV
V
1
-V
2
>=0
OUT 6
OFF
OFF
OFF
ON
OUT 7
ON
OFF
OFF
OFF
Fig. 1
2.0
Output Saturation Voltage vs.
Ambient Temperature
V
CC
=12V
I
O
=250mA
Fig. 2
2.0
Output Saturation Voltage vs.
Input Current (Continuous)
V
CC
=12V
T
a
=25˚C
Output saturation voltage V
OUT
(V)
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
Output saturation voltage V
OUT
(V)
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
0
-40 -20 0 20 40 60 80 100
Ambient temperature T
a
(˚C)
100
200
300
Input current(Continuous) I
O
(mA)
Hall IC
Fig. 3
20
LT202A
Supply Current vs. Ambient
Temperature
Fig. 4
20
Supply Current vs. Supply
Voltage
Supply current I
CC
(mA)
14
12
10
8
6
4
2
0
-40 -20 0 20 40 60 80 100
Ambient temperature T
a
(˚C)
Supply current I
CC
(mA)
V
CC
=12V
18 At no-load
16
T
a
=25˚C
18 At no-load
16
14
12
10
8
6
4
2
0
0
5
10 15 20 25 30
Supply voltage V
CC
(V)
35
Fig. 5
20
Coil Input Sensitivity vs. Ambient
Temperature
V
CC
=24V
Fig. 6
Operating magnetic flux density B
2
(mT)
Operating Magnetic Flux Density
vs. Ambient Temperature
Coil input sensitivity V
IN
(mV)
18
16
14
12
10
8
6
4
2
0
-40 -20 0 20 40 60 80 100
Ambient temperature T
a
(˚C)
12 V
CC
=24V
10
8
6
4
2
0
-2
-4
-6
-8
-10
-12
-40 -20 0 20 40 60 80 100
Ambient temperature T
a
(˚C)
Fig. 7
Alarm output saturation voltage V
SAT
(V)
0.20
Alarm Output Saturation Voltage
vs. Ambient Temperature
Fig. 8
Alarm output saturation voltage V
SAT
(V)
0.10
0.08
0.06
0.04
0.02
Alarm Output Saturation Voltage vs.
Alarm Output Sink Current
V
CC
=12V
T
a
=25˚C
V
CC
=24V
0.18 I
SINK
=4mA
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0
-40 -20 0 20 40 60 80 100
Ambient temperature T
a
(˚C)
0
0
1
2
3
4
5
6
Alarm output sink current I
SINK
(mA)
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
